1 /* 2 * Copyright (c) 2012-2014 Qualcomm Atheros, Inc. 3 * 4 * Permission to use, copy, modify, and/or distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17 #include <linux/module.h> 18 #include <linux/pci.h> 19 #include <linux/moduleparam.h> 20 #include <linux/interrupt.h> 21 22 #include "wil6210.h" 23 24 static int use_msi = 1; 25 module_param(use_msi, int, S_IRUGO); 26 MODULE_PARM_DESC(use_msi, 27 " Use MSI interrupt: " 28 "0 - don't, 1 - (default) - single, or 3"); 29 30 static 31 void wil_set_capabilities(struct wil6210_priv *wil) 32 { 33 u32 rev_id = ioread32(wil->csr + HOSTADDR(RGF_USER_JTAG_DEV_ID)); 34 35 bitmap_zero(wil->hw_capabilities, hw_capability_last); 36 37 switch (rev_id) { 38 case JTAG_DEV_ID_SPARROW_B0: 39 wil->hw_name = "Sparrow B0"; 40 wil->hw_version = HW_VER_SPARROW_B0; 41 break; 42 default: 43 wil_err(wil, "Unknown board hardware 0x%08x\n", rev_id); 44 wil->hw_name = "Unknown"; 45 wil->hw_version = HW_VER_UNKNOWN; 46 } 47 48 wil_info(wil, "Board hardware is %s\n", wil->hw_name); 49 } 50 51 void wil_disable_irq(struct wil6210_priv *wil) 52 { 53 int irq = wil->pdev->irq; 54 55 disable_irq(irq); 56 if (wil->n_msi == 3) { 57 disable_irq(irq + 1); 58 disable_irq(irq + 2); 59 } 60 } 61 62 void wil_enable_irq(struct wil6210_priv *wil) 63 { 64 int irq = wil->pdev->irq; 65 66 enable_irq(irq); 67 if (wil->n_msi == 3) { 68 enable_irq(irq + 1); 69 enable_irq(irq + 2); 70 } 71 } 72 73 /* Bus ops */ 74 static int wil_if_pcie_enable(struct wil6210_priv *wil) 75 { 76 struct pci_dev *pdev = wil->pdev; 77 int rc; 78 /* on platforms with buggy ACPI, pdev->msi_enabled may be set to 79 * allow pci_enable_device to work. This indicates INTx was not routed 80 * and only MSI should be used 81 */ 82 int msi_only = pdev->msi_enabled; 83 84 wil_dbg_misc(wil, "%s()\n", __func__); 85 86 pdev->msi_enabled = 0; 87 88 pci_set_master(pdev); 89 90 /* 91 * how many MSI interrupts to request? 92 */ 93 switch (use_msi) { 94 case 3: 95 case 1: 96 wil_dbg_misc(wil, "Setup %d MSI interrupts\n", use_msi); 97 break; 98 case 0: 99 wil_dbg_misc(wil, "MSI interrupts disabled, use INTx\n"); 100 break; 101 default: 102 wil_err(wil, "Invalid use_msi=%d, default to 1\n", use_msi); 103 use_msi = 1; 104 } 105 106 if (use_msi == 3 && pci_enable_msi_range(pdev, 3, 3) < 0) { 107 wil_err(wil, "3 MSI mode failed, try 1 MSI\n"); 108 use_msi = 1; 109 } 110 111 if (use_msi == 1 && pci_enable_msi(pdev)) { 112 wil_err(wil, "pci_enable_msi failed, use INTx\n"); 113 use_msi = 0; 114 } 115 116 wil->n_msi = use_msi; 117 118 if ((wil->n_msi == 0) && msi_only) { 119 wil_err(wil, "Interrupt pin not routed, unable to use INTx\n"); 120 rc = -ENODEV; 121 goto stop_master; 122 } 123 124 rc = wil6210_init_irq(wil, pdev->irq); 125 if (rc) 126 goto stop_master; 127 128 /* need reset here to obtain MAC */ 129 mutex_lock(&wil->mutex); 130 rc = wil_reset(wil, false); 131 mutex_unlock(&wil->mutex); 132 if (rc) 133 goto release_irq; 134 135 return 0; 136 137 release_irq: 138 wil6210_fini_irq(wil, pdev->irq); 139 /* safe to call if no MSI */ 140 pci_disable_msi(pdev); 141 stop_master: 142 pci_clear_master(pdev); 143 return rc; 144 } 145 146 static int wil_if_pcie_disable(struct wil6210_priv *wil) 147 { 148 struct pci_dev *pdev = wil->pdev; 149 150 wil_dbg_misc(wil, "%s()\n", __func__); 151 152 pci_clear_master(pdev); 153 /* disable and release IRQ */ 154 wil6210_fini_irq(wil, pdev->irq); 155 /* safe to call if no MSI */ 156 pci_disable_msi(pdev); 157 /* TODO: disable HW */ 158 159 return 0; 160 } 161 162 static int wil_pcie_probe(struct pci_dev *pdev, const struct pci_device_id *id) 163 { 164 struct wil6210_priv *wil; 165 struct device *dev = &pdev->dev; 166 int rc; 167 168 /* check HW */ 169 dev_info(&pdev->dev, WIL_NAME 170 " device found [%04x:%04x] (rev %x)\n", 171 (int)pdev->vendor, (int)pdev->device, (int)pdev->revision); 172 173 if (pci_resource_len(pdev, 0) != WIL6210_MEM_SIZE) { 174 dev_err(&pdev->dev, "Not " WIL_NAME "? " 175 "BAR0 size is %lu while expecting %lu\n", 176 (ulong)pci_resource_len(pdev, 0), WIL6210_MEM_SIZE); 177 return -ENODEV; 178 } 179 180 wil = wil_if_alloc(dev); 181 if (IS_ERR(wil)) { 182 rc = (int)PTR_ERR(wil); 183 dev_err(dev, "wil_if_alloc failed: %d\n", rc); 184 return rc; 185 } 186 wil->pdev = pdev; 187 pci_set_drvdata(pdev, wil); 188 /* rollback to if_free */ 189 190 wil->platform_handle = 191 wil_platform_init(&pdev->dev, &wil->platform_ops); 192 if (!wil->platform_handle) { 193 rc = -ENODEV; 194 wil_err(wil, "wil_platform_init failed\n"); 195 goto if_free; 196 } 197 /* rollback to err_plat */ 198 199 rc = pci_enable_device(pdev); 200 if (rc) { 201 wil_err(wil, 202 "pci_enable_device failed, retry with MSI only\n"); 203 /* Work around for platforms that can't allocate IRQ: 204 * retry with MSI only 205 */ 206 pdev->msi_enabled = 1; 207 rc = pci_enable_device(pdev); 208 } 209 if (rc) { 210 wil_err(wil, 211 "pci_enable_device failed, even with MSI only\n"); 212 goto err_plat; 213 } 214 /* rollback to err_disable_pdev */ 215 216 rc = pci_request_region(pdev, 0, WIL_NAME); 217 if (rc) { 218 wil_err(wil, "pci_request_region failed\n"); 219 goto err_disable_pdev; 220 } 221 /* rollback to err_release_reg */ 222 223 wil->csr = pci_ioremap_bar(pdev, 0); 224 if (!wil->csr) { 225 wil_err(wil, "pci_ioremap_bar failed\n"); 226 rc = -ENODEV; 227 goto err_release_reg; 228 } 229 /* rollback to err_iounmap */ 230 wil_info(wil, "CSR at %pR -> 0x%p\n", &pdev->resource[0], wil->csr); 231 232 wil_set_capabilities(wil); 233 wil6210_clear_irq(wil); 234 235 /* FW should raise IRQ when ready */ 236 rc = wil_if_pcie_enable(wil); 237 if (rc) { 238 wil_err(wil, "Enable device failed\n"); 239 goto err_iounmap; 240 } 241 /* rollback to bus_disable */ 242 243 rc = wil_if_add(wil); 244 if (rc) { 245 wil_err(wil, "wil_if_add failed: %d\n", rc); 246 goto bus_disable; 247 } 248 249 wil6210_debugfs_init(wil); 250 251 252 return 0; 253 254 bus_disable: 255 wil_if_pcie_disable(wil); 256 err_iounmap: 257 pci_iounmap(pdev, wil->csr); 258 err_release_reg: 259 pci_release_region(pdev, 0); 260 err_disable_pdev: 261 pci_disable_device(pdev); 262 err_plat: 263 if (wil->platform_ops.uninit) 264 wil->platform_ops.uninit(wil->platform_handle); 265 if_free: 266 wil_if_free(wil); 267 268 return rc; 269 } 270 271 static void wil_pcie_remove(struct pci_dev *pdev) 272 { 273 struct wil6210_priv *wil = pci_get_drvdata(pdev); 274 void __iomem *csr = wil->csr; 275 276 wil_dbg_misc(wil, "%s()\n", __func__); 277 278 wil6210_debugfs_remove(wil); 279 wil_if_remove(wil); 280 wil_if_pcie_disable(wil); 281 pci_iounmap(pdev, csr); 282 pci_release_region(pdev, 0); 283 pci_disable_device(pdev); 284 if (wil->platform_ops.uninit) 285 wil->platform_ops.uninit(wil->platform_handle); 286 wil_if_free(wil); 287 } 288 289 static const struct pci_device_id wil6210_pcie_ids[] = { 290 { PCI_DEVICE(0x1ae9, 0x0310) }, 291 { PCI_DEVICE(0x1ae9, 0x0302) }, /* same as above, firmware broken */ 292 { /* end: all zeroes */ }, 293 }; 294 MODULE_DEVICE_TABLE(pci, wil6210_pcie_ids); 295 296 static struct pci_driver wil6210_driver = { 297 .probe = wil_pcie_probe, 298 .remove = wil_pcie_remove, 299 .id_table = wil6210_pcie_ids, 300 .name = WIL_NAME, 301 }; 302 303 static int __init wil6210_driver_init(void) 304 { 305 int rc; 306 307 rc = wil_platform_modinit(); 308 if (rc) 309 return rc; 310 311 rc = pci_register_driver(&wil6210_driver); 312 if (rc) 313 wil_platform_modexit(); 314 return rc; 315 } 316 module_init(wil6210_driver_init); 317 318 static void __exit wil6210_driver_exit(void) 319 { 320 pci_unregister_driver(&wil6210_driver); 321 wil_platform_modexit(); 322 } 323 module_exit(wil6210_driver_exit); 324 325 MODULE_LICENSE("Dual BSD/GPL"); 326 MODULE_AUTHOR("Qualcomm Atheros <wil6210@qca.qualcomm.com>"); 327 MODULE_DESCRIPTION("Driver for 60g WiFi WIL6210 card"); 328